Covering for glass lamp shades or reflectors



Oct. 12 1926.

' I R. G. WILLIAMS COVERING FOR GLASS LAMP SHADES OR REFLECTORS Fi'led May 19, 1925 2 Sheets-Sheet 1 R. G. WILLIAMS COVERING FOR GLASS LAMP SHADES on REFLEcTons Oct. 12 1926.

2 Sheets-Sheet 2 Filed ,May 19. 1925 WVL'A/I'Ol? g. WILLIAMS v ROLLO ,errnn'srrn warning, or wnyrBLE 1 now snn MABBYAT,

90. w; ENGPANI Assam or Que-3 M" r 9 t m wrem I covnrtrive non eL ss Lmi/rrsH nes onnnlr rncrons.

Application filed May 19; 1325, Serial No This invention relates to reflecting coverings for prismatic, ribbed, corrugated. or-

other (e. g. plain) glessxlempshades :or. re-

flectors and-has for its object to'produce adust proof covering, which has a high efiiciency' as a reflector,xis light and is capable moi-being ornamented nany Ways ':-According qtothe invention, "the glass-1: '"lampshade or reflector has a reflectlng .cov- :eringsecured toitsextenor surface by :Ineans wterial, which will hereinafter be referred l .as papier amztch; This inner reflecting covering may advantageously consist of a matic; ribbed or like shades or/reflectors; (hereinafterreiferred'toas ribbed reflectors) rests on thezan lesior crests ofthe prismsby theymflenial ,of'the'1innerlayer itself-tor b pigment appliedthereto-in anyisuiteble' the-inner or reflectinglayer {or-portion of layer of paper which in the case of pris-' or ribs of the shade'or reflector vand :is'not in optical contact'w ith the remaining parts" (Ofil'l'e' exterior surface of such shade or refle'ctor. The inneror reflecting layer or" portion of the covering is preferably 7 made i separately: from the remaining portion of the {covering and is placed in p,osition:on'=

the glass shade ,or reflector in a dry conditi on, The reflecting suriacejmaiy :be formed i aninelf- In some ca-ses e glayerjofresilien-tmaterial;

such as asbestos fibre, is arrangedfbetween --the covering; and the layer of :p epier mt'ch or. like material. Moreo er :the covering:

may be ,rein forced xe..g.i thejpan'ts Where 7 :the surface is curved inwards, blyime'ans' of gSiRIIiPS, bands or-layers of textile or other i may. be dispensed vvi'th 'anclizthe reflecting fl-su-rfece may be gformedwby 'papier mch io'r ,materiel of-rgreeter mechenical .strength zor- )by metwl rings 'or frames; 1 e In 21; further mod'fication, ithe inner layer like plastic -mjaterialo either alone-or treated v vith a suitable heat resisting pigment and i so arranged; fies to form ,an' airtight andfl elitist-tight joint with it prismatic, ,ri bbedlor o t m bord t ereof: it j in the accompanying drawin flrcorruggitedshedeiormefiector at the ;top end I {1): having a prismatic, outer surface.

Figure ;1 shows a glass shade: of a knovvn, "W! i tithe ssure/shade,-

. 31,425, and infireat'Britain May 30, 1324. i

the improved reflecting covering applied thereto? line XX, Figure 2. i g

:Figure Avis a :side viewof the complete .Ishade. W F

'il igure :5 is'ia. View similar armedifie-d :form of shade. v

.tion. 7 i

Figure *1 is a side f e'levati-on,' pertly in section and with p i another modificatiom an-d Figure 8 is euverticzcl section :of'=a,-sti11 ituther modification. i V j r I In carrying! the invention-"into practice,

which may :be-jof the same shape, e.- g as in Figure 3 is a iregmentarysection on" the.

shown partly in vertical section, and having Figure 6 is a'yertical vsection of at pm tijon of aishedelembodyin'ga further-modificathe inner reflecting 'leyen or portion A of j the covering, Whichqm-ay be-"wl ljite"'or-jcoloured is prepared on "a suitable *fornier' Figures 2, 3' and/l; as the glass shadebr re flectO-r'B, orjitim fy bego f difi'e-rentshape; e. I p .g. as in "Eigure'fi, to'such glass reflector"; so i 1 that the distribution of light isvar'idifi'lhis;

.inn'er leyer orportion of the coyering is placed in position on the glass shade B' in 1's dry condition, means being providedin some cases :for pfreventing the" passagefof between the covering andfithe surface of the it impermeable. In some eases; the inner reflecting' covering 7 may {be i made of a ,sui t v :sble composition or materiel which becomes i nable celluloid known as eele'stoid,"such name being a registered trade inerk. or The 53pm rn' ziche "or othergfplastic material G formingthe outer layeror portion of the covering is ma defin et'grnould to fit thegexteriorp of the inner lat-yer or portion of the coverin'g an'd 'w hilein such' mould and when art1a11ynr =the 3 inner layer or portion is placed position. The" glass 'sh a de or reflector is then placed therein and the pepier'mfiche covering While stillmoist'i turned :over the bottom edge of the glass reflectorr The upp'e'r ed'geof the Ppap'ier glass,' for eXemplejthe surface off such layer Aistre ated With a suitable waterproofg ver-' nifsh or compoundjAf Fi gurefi') to render o 5 mfichecoveringgfite'elosely up to thesgnnfuler f 1 is formed directly on the-outside of the inthe latter has been her layer or portion of the covering after dried as above mentioned.

In cases where the reflecting layer A next the glass is formed'of non-inflammable celluloidor similar material, an intermediate layer A (Figure 6) ofpaper or other suitable material is arranged between the celastoid or similar material and the outer layer C of papier mach. If areinforcement, e. g.

of textile material E a (Figure 7) is employed, it may be advantageously arranged between the layer of paperand the outer covering of papier mach.

One advantage of applying the papier mach covering as above mentioned is that the papier mach does not shrink into the spaces between the prisms, ribbings or the like on the outer surface of the glass reflector, but rests only on their outer edges,

thus avoiding optical contact with the sur-' ,faces of the prisms. Y covered may The glass reflectors gpractical work. v I

By using a composite reflector consisting of a glass reflector having a prismatic: or

ribbed outer surface, and a paper miich coveringor shape lined with a white or other colour reflecting substance the efficiency of the shade as a light refiectoris'increased;

and the outside of the glass reflector having prlsmsi ribbings or the like is kept perfectly clean, so that the prisms are-maintained at their highest efficiency, which would not be the case if they were to become dirty.

7 Moreover the composite reflector weighs less than would be the case if the outer covering were of metal thusputting less strain upon the fittings holding it.

' y In order to prevent cracking of the outer papier mach layer during the. contractionor other resilient materialmay be arranged.

of thesame :which -takes place during .the drying, a' layer ofasbestos A" (Figure 8) betweenthe inner (A) and outer (C) layers or parts of the covering. Such asbestos layer A may also be' continued inwards,

' asshown, so as to form the uppermost part I ;.of the inner layer, i. e. at the place where I theshade fits closely round the holder of the a glow lamp and the temperature "is consequently a maximum.

be of all the shapes used in By treating the exterior surface of the outer covering with a suitable waterproof enamel, paint or varnish, the coyering may be adapted for use in the open air.

The covering may be reinforced preferably by one or more layers of open mesh textile fabric, as at E, Figure 7; or by means of metal rings or frames spun to fit the exterior surface of the inner or outer layer. Such metal rings or frames may have fingers or lugs formed thereon to engage the flange D so as to retain them in position.

The papier mache may be decorated externally in any colour, or coated to imitate bronze or other metal.

I claim:

1. A light reflector for illumination at vices, comprising in combination aglass lampshade having an externally ribbed sun face, a layer of material having. a reflecting surface resting on the crests of'thewribsfand out of optical contact with the remainder of the glass lampshade, and a covering of pa pier mach applied in a plastic condition around the layer of reflecting material so as to enclosethe same and also moulded'in' a plastic condition directly on to the glass lampshade so as to form a PQITIIlfiIlelltfllftight and dustproof jointtherewith at the upper and lower borders thereof. g

'2. A light reflecting shade for illum1nation devices, comprising a glass lampshade having an externally ribbed surface, alayer of paper having a reflecting surface resting on the crests of the ribs and out of optical contact with the rest of the glass lampshade, and a covering of papier mach arranged around said layer of pa'perso as to enclose v the same and to secure it upon the'said glass lampshade, said layer of papier niach forming an air-tight and dustproof joint with the glass lampshade at the top and bottom borders thereof. g c

3. A light reflecting shade for illumination devices, comprising a glass lampshade having an externally ribbed surface a layer of paper having a reflecting surface resting .onthe crests of the ribs and out of optical contact with the rest, of the glass lampshade, a covering of papier mach arranged around said layer of paper, 'said covering of papier mach forming an air-tight and dustproof joint with the lampshade. at the top and bottom borders thereof, and a reinforcing strip of textile materialarranged underneath the papier mach.

4:. A light reflecting shade forfillumination devices, comprising a glass lampshade having an externallyribbed surface,a layer of paper having areflectingsurface resting on the crests ofthe ribs and out of optical contactwith the rest of the glass lampshade, a layer of resilient material arranged around the layer of reflecting material and alcoveringof papier mach around said layer of resilient material, said covering of papier mach forming an air-tight and dust proof joint with the lampshade at the top and bottom borders thereof. p

' 5. A light reflecting shade for illuminating devices, comprising a glass lampshade having an externally ribbed surface, a layer of material having an inner reflecting surface resting on the crests of the ribs of said glass lampshade'and out of optical contact- With the remainder of the adjacent surface of said lampshade, a covering of papier 'mach enclosing said first-named layer and forming an air-tight and dustproof joint with said lampshade at the top and bottom borders of the latter, and alayer of reinforcing material arranged between said first-named layer and mach.

6. A light refl ctingshade for .ilhiniinat ing devices, comprising a glass lampshade having an externally ribbed surface-a layer of material having an inner reflecting surface resting on'the crests ofthe ribs of said glass lampshade and out of optical contact With the remainder of the adjacentsurface terial arranged substantially at "the inner surface of the layer of papier mach.

ROLLO GILLESPIE WILLIAMS.

the layer of papier 

